Malicious PDF — malware analysis report

Static analysis result for SHA-256 550f4eace1008f35…

MALICIOUS

PDF

74.4 KB Created: 2021-02-27 12:55:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 588b6fca02a0dbb7aa03d34241ca6a64 SHA-1: bddd8518effaa040f326c1c1d94ee8f305cf6de5 SHA-256: 550f4eace1008f3584cd6a1dc540ab3d0a7cea8b662bdba7df6c8fe84189e4d6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with a notable heuristic identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. The presence of external URIs suggests an attempt to redirect the user to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://bologen.ru/award?keyword=slue+foot+sue PDF link annotation
    • http://yoga-italy.space/tropic_of_cancer_mapt2v22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470696/normal_6013a2840e46d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465565/normal_5fd2ceaa946db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471230/normal_5fed3ed58b874.pdfIn PDF document text
    • http://cooldomen.space/fumeronozerewagq6q7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371808/normal_6035608e06494.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413011/normal_60162411259fe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/financial_reporting_quality_ppt.pdfIn PDF document text
    • http://febefijawifuja.rf.gd/puzemetubasoxuvopilesig.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/26874319645.pdfIn PDF document text
    • http://toxuxefegetej.rf.gd/simplicity_coronet_parts_manual.pdfIn PDF document text
    • http://fudixuxutinizow.rf.gd/59970580078.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/42733792120.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/zukewezox.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/tasediziwop.pdfIn PDF document text
    • http://zenujasope.epizy.com/autodesk_vault_server_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/natewared/vedirawevagetudigiga.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA54 4556 bytes
SHA-256: eaa6ad687b00b47462c432b0f48a7f1a866ad0fe899622a71474edc1796abd58
font_01_sfnt_off0000f9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EE 10240 bytes
SHA-256: c3981f4f06fd7c39d13db14f2f416c0792b3ac224f856e76c255353ef5049f98

Open this report in the interactive analyzer, or submit your own file for analysis.